As I was admiring the view once again this morning, I noticed that my lost buoy had returned! Some of you may be thinking. - "The dummy was just looking yesterday at a high tide, and now it's low tide, and the buoy is snagged on something" - wrong. The buoy was absent all day yesterday, even at low tide. My best guess at this point is that during the lowest evening tide, the chain snagged on something, submerging the buoy yesterday. Then last night, during the next low low tide, it worked the snag free. Whatever the cause of the mystery disappearance, my mooring system is still intact.